interview with the makers over at
GamaSutra EW: We hoped to do that. We had this theory that games tell two stories. There's the "story story" which is the cutscenes and the dialogue, and the "gameplay story" which is the story that's described by the actions you take in the game world. The theory was that the closer you could bring those two stories together, the more satisfying the game would be.
I spent years and years reviewing games, and that's something that always bothered me in games, where the delta between the two stories was real high. I promised myself someday that if I ever got the chance, I'd try to make a game where that delta was almost zero. It was a conscious decision that we wanted to try and keep that world.
KS: It takes you out of the experience, really. You're doing one thing, then all of a sudden the story is telling you, "No, no. You actually did this other thing." "But no, I just did the... all right, fine. You're right, then." I agree with Erik that the closer the gameplay interacts with the story, the more impact it has with players.
they also talked about the fact that they were playtesting as soon as possible, so they didn't make a big finished thing and then playtested, they platested the second they could without any polish, which helped them focus on fun, instead of working on it forever and hoping it winds up fun